My idea was to somehow not start the video app, but launch a video directly, but for lack of a file manager on iOS, this is not easy.
Turns out it is... simply do a spotlight search for a known video name, wait for it to appear in the search results and tap on it there. Next best thing to a file manager :)

Voila, the video app should start and not freeze...
Works everytime for me know... a bit cumbersome, but still.